Roasting-furnace.



No. 831,165. 1 PATENTED sEPT.18, 19106..

F. KLEPET'KO.

ROASTING PURNACE.

APPLIGATION FILED Nov. s, 1905.

Tgl IZ f' 10 YF r1-gf1-g5- FRANK KLEPETKO, OF NEW YORK, N. Y.

ROASTING-FURNACE.

Specification of Letters Patent.

raten'tea sept. 1s, 1906.-

Applioation led November 6, 1905. Serial No. 286,045.

To a/ZZ whom it may concern:

Be it known that I, FRANK KLEPETKO, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Roasting-Furnaces,of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, forming a part hereof.

My invention has relation to improvements in roasting-furnaces; and itconsists in the novel construction and arrangement of parts more fullyset forth in the specification and pointed out in the claims.

In the drawings, Figure 1 is a middle vertical section of a conventionalMcDougall ore-roasting furnace, partly broken, showing a correspondingsection of one form of my invention applied thereto. Fig. 2 is avertical section through one of the rabble-arms on the line 2 2 ofFig. 1. FigB is a corresponding section of the adjacent rabble-arm onthe line 3 3 of Fig. 1. Fig. 4 is a horizontal section on the line 4 4of Fig. 1. Fig. 5 is a diagrammatic view of a modification of myinvention. Fig. 6 is a diagrammatic view showing a second modification.Fig. 7 is a vertical sectional detail. of the top of the shaft, showinga modified form of stuffingbox and chamber for receiving the exhaust;and Fig. 8 is a similar view showing a still further modification fordisposing of the exhaust.

The object of the present invention is to utilize superheated steam as acooling medium in effecting the necessary reduction in the temperatureof the hollow rabble-shaft and rabble-arms used in connection with theturret or McDougall type of roasting-furnace with a view of preservingthe rabble apparatus against the destructive and deleterious effects ofthe gases and high temperature to which these parts are subjected duringthe roasting operation. The main object of using superheated purpose isto avoid using excessive quantities of water for cooling, water having alarge capacity for heat absorption and being for that reason in manyinstances objectionable, since the absorption of an abnormal number ofheat units from the furnace charge or ore results in such a decidedreduction in the temperature thereof as .to render the steam or vaporfor the roasting incomplete. Besides it converts the furnace into ahot-water generator, which is not always desired. The presentimprovement is a qualification of a construction utilizing superheatedsteam for a similar purpose and for which an application for LettersPatent was filed of even date herewith, the differencebeing that thecirculation of the cooling medium through the several rabblearms andhearths both vertically and radially is in series instead of in seriesand in multiple.

In detail the invention may be described as follows:

Referring to the drawings, F represents the furnace, and h the severalhearths in which the material is treated, the said material droppingfrom the upper hearth successively through the several hearths until itis delivered into the delivery-hopper, (not shown,) the hearths beingprovided, respectively, with the central and marginal openings 1 2 forIthe passage of the material. Passing `centrally through the hearths isthe rotatable hollow rabble-shaft 3, from which radiate the series ofhollow arms 4, extending into the several hearths and carrying rakes 5,

by which the material is successively fed from one hearth to the hearthimmediately beneath it, all as fully understood in thefart.

Referring particularly to Fig. 1 of the drawings, 6 represents a feederor feed-pipe, preferably stationary, which is located within the shaftextending to a point adjacent to one end of the shaft and preferably thebottom, (though obviously it could pass through` the bottom andterminate at a point near the top, as shown by feeder p in Fig. 5,without departing from the nature of the invention, the differenceresulting in a reversal of the circulation, as must be obvious from theconstruction,) the upper end of the pipe passing into a stuffing-box 7,from which extends the supply-pipe 6', leading to any source ofwater-supply. (Not shown.) The shaft is divided into a series ofcompartments or chambers a l) c d e f g, (the furnace being `broken toomit chambers c and d,) the chamlTOO pipe 9, the former, spanning, as itdoes, they partition 8, naturally exceeds the pipe 9 in length an amountequal to the diameter of the cross-section of the shaft or the diameterof the partition 8 (where thev shaft is cylindrical.) The upper end ortop compartment -of the shaft is provided with an outlet or dischargepipe 10, the exhaust being conducted to any desired point ofconsumption.

In the operation of the circulating system as applied to the presentrabble shaft and arms the water is delivered in limited quantities intothe bottom compartment a of the series, the said water being vaporizedand constrained to pass through the several shaft compartments and armsand their distributing-pipes, as shown by the arrows in Fig. 1- that isto say, the vapor or steam (which in its passage upward becomessuperheated) passes from the compartment a through the pip-e 9 into therabble-arm which contains it, thence through the complementary pipe 9'into the opposite arm 4 of the same pair,

f haust-pipe 10. As circulation of the ,thence into the next compartmentt, and so on till the last compartment is reached, where the steamexhausts through the exseen from the arrows, the

tubes and arms vertically is in series, but radially the circulation isthrough a multiple distributing-pipes of arms, although to effect thismultiple radial circulation the circulation through the 9 9 and the armsis radially in series. By circulation radially through a multiple7 is ofcourse meant that'the current passes successively or in series through amultiple of arms disposed in the same plane about the shaft andextending into any particular hearth, being distinthrough several arms.

guished,v from a circulation in multiple, where v'the same is asimultaneous one The construction here shown would of course be equallyapplicable to water or any steam, gas, or any vapor.

The feeder may of course pass into the liquid as well as lowercompartment a through the bottom of l the shaft and terminate in saidcompartment, as shown by feeder p in Fig. 6, the

' circulation being in every respect the same as already described. InFig. 5, where the circulation'is downward, the exhaust-pipe is lrepresented by 10.

In Fig. 1 the exhaust-pipe 10 leads from a i sleeve or tube 12enveloping the feeder 6, the

stufling-box 7 forming the upper end of said vapor through the shaftvsleeve, which is coupled in any mechanical In Fig. 7 the upper open endof the shaft l 3 rotates within an inverted cup 14, coupled to the roofof the furnace in any mechanical manner, a suitable stuffing-box 15being interposed between the parts, the feeder passing through astufling-box 16 at the top of the cup and the exhaust-pipe 17 conveyingthe exhaust-steam from the peripheral Wall of the cup to any suitablepoint of consumption.

In Fig. 8 the feeder 18 is disposed to one side of the axis of the shaft3, leading from the bottom of an annular water-trough 19, to which wateris supplied from a pipe 20. In this modification the exhaust-pipe 21passes centrally out of the top compartment of the shaft 3 through astuffing-box 22. The trough 19 of course rotates with the shaft.

The above are a few examples of the manner in which the exhaust-steammay be disposed of but of course they may be multiplied almostindefinitely.

Having described my invention, what I claim is` 1,'In a rabbleapparatus, a hollow shaft and hollow arms therefor, a feeder passingcentrally through the shaft and discharging a cooling medium thereintoat one end of the shaft, and means for circulating said medium throughthe shaft and arms vertically in series, and radially through amultiple, sub-l stantially as set forth.

2, In a furnace having a plurality of hearths, a hollow shaft passingthrough the hearths, a series of hollow arms radiating from said shaftand extending into the several hearths, a series of contiguouscompartments disposed throughout the shaft, a tube leading from eachcompartment into one of the arms extending into any hearth, acomplementary tube leading from said arm to the adjacent arm of the samehearth, and means for circulating a cooling medium through the shaft andtubes vertically in series, and into the arms radially through amultiple, substantially as set forth,

3. In a furnace having a plurality of hearths, a hollow shaft passingthrough the hearths, a series of hollow arms radiating from said shaftand extending into the several hearths, a series of contiguouscompartments disposed throughout the shaft, a tube leading from eachcompartment into one of the arms extending into any hearth, a com- IOGplementary tube leading from said arm to the adjacent arm of the samehearth, and means for circulating a cooling medium through the shaft,and tubes vertically in series, and radially in series, substantially asset forth.

4. In a furnace having a plurality hearths, a series of hollow armsradiating from said shaft and extending into the several hearths, aseries of contiguous compartments separated by transverse partitionsdisposed throughout the shaft, a tube leading from each compartment onone side of a partition into one of the arms extending into any hearth,a complementary tube leading from said arm on the opposite side of saidpartition to the adjacent arm of the same hearth, a feeder discharging acooling medium into one end of the shaft, and an outlet for said mediumat the opposite end of the shaft, substantially as set forth.

-5. n a rabble apparatus, a hollow shaft and hollow arms therefor, aseries of compartments distributed throughout the shaft and separated bycontiguous partitions, a tube leading from one compartment to an arm onone side of a partition, and a complementary tube leading from said armon the opposite side of the partition to an adjacent arm, substantiallyas set forth.

6.- ln a rabble apparatus, a hollow shaft, and hollow arms therefor,means for heating the same, and means for feeding limited quantities ofcooling liquid into one end of the shaft whereby the same is vaporiZedand allowed to circulate through said shaft and arms, substantially asset forth.

7. 1n a furnace-rabble apparatus, a hollow shaft and hollow armstherefor, means for introducing thereinto limited quantities of liquidadapted to be vaporized under the action of the heat from the furnacecharge, and

of hearths, a hollow shaft passing through the j means for circulatingsaid vapor through said I shaft and arms, substantially as set forth.

8. In a furnace-rabble apparatus, a hollow I shaft and hollow armstherefor, means for inl troducing thereinto limited quantities of liquidadapted to be vaporized under the action of the heat of the furnacecharge, and means j for circulating the said vapor through said j shaftand arms vertically in series and radially through a multiple, setforth.

substantially as 9. ln a furnace-rabble apparatus, a hollow shaft andhollow arms therefor, me ans for introducing thereinto limitedquantities of liquid adapted to be vaporized under the action j of theheat of the furnace charge, means for l circulating the said vaporthrough the shaft and arms vertically -in series, and radially through amultiple, and a suitable exhaust for said circulating medium,substantially as set forth. j 10. n a rabble apparatus, a hollow shaftand hollow arms therefor, means for circulating a cooling medium throughthe shaft and arms vertically in series and radially in series, andinlet means and outlet means for the circulating medium at one end ofthe shaft, substantially as set forth.

11. 1n a rabble apparatus, a hollow shaft and hollow arms therefor,means for circulating a cooling medium through the shaft and armsvertically in series and radially in series, and inlet means and outletmeans for the circulating medium at the top of the shaft, substantiallyas set forth.

In testimony whereof l affix my signature in presence of two witnesses.

FRANK KLEPETKO-,

v Witnesses;

l EMIL STAREK, l J. E. DEAKIN.

